The present work proposes a new numerical approach based on the derivation method of Bridgman to determine (K IC ) of galvanized steel sheets. The method relies on a fracture analysis numerical code “Franc2D,” which permits to simulating the initiation and propagation of a crack on grooved tensile specimens. First, the stress intensity factor is obtained while the crack is propagating and then (K IC ) is determined from the fitting curves of the stress intensity factor (K I ) to crack length (a) plot through mathematical transformations. The results are validated by comparing them to those obtained through the experimental approach using Vickers hardness based IEF engineering models. The relative values of (K IC ) are admissible and acceptable with a coefficient of variation of 14% for a large range of groove radius. Hence, the present numerical simulation can be fairly used in order to reduce time consuming and avoid costly experimental mechanical tests.
The International Journal of Advanced Manufacturing Technology – Springer Journals
Published: Mar 1, 2017
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